The ODL100/M from Thorlabs Inc is an Optical Delay Line that has a maximum optical delay of 670 ps. It has a minimum delay shift of 33 fs and a beam height of 60 mm. This optical delay line includes a DC servo stage, controller, low-dispersion silver-coated retroreflector optics with mounts, and two drop-in irises with four mounting positions for alignment. It has a knife-edge prism at one end of the translation stage that reflects the beam towards two V-block-mounted mirrors on the translating platform. This optical delay line has a brushless DC motor with linear bearings and has a travel range of 100 mm. It is available in a module that measures 195 x 57 x 35 mm.